Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 16-02-2020, 03:34   #1
Registered User

Join Date: Jun 2015
Location: Maylandsea Blackwater
Boat: Project 31
Posts: 14
Battery Terminal Corrosion

Ahoy ! Have a large growth of furry corrosion on negative terminal of port battery only although isolator switch is off. Assume electrolytic action but where from and why one side only ? Tidal saltwater.
Jim
__________________

jimthesail is offline   Reply With Quote
Old 16-02-2020, 04:47   #2
Do or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 10,589
Re: Battery Terminal Corrosion

Quote:
Originally Posted by jimthesail View Post
Ahoy ! Have a large growth of furry corrosion on negative terminal of port battery only although isolator switch is off. Assume electrolytic action but where from and why one side only ? Tidal saltwater.
Jim
Ive seen this happen when the seal between battery case and terminal was broken. This can happen if it has been loaded by the attached cable pulling on it.
__________________

s/v Jedi is offline   Reply With Quote
Old 07-03-2020, 06:30   #3
Registered User

Join Date: Jun 2015
Location: Maylandsea Blackwater
Boat: Project 31
Posts: 14
Re: Battery Terminal Corrosion

Checked terminal and sealed OK so dismissed suggestion ! But, lo and behold, when I extracted battery to clean and charge found alternator pulley had gouged a neat hole in centre top corner. Suspect vapour forms an external battery in the atmosphere and produces the growth which is soft and furry ! Problem solved, I hope ?
Thanks
Jim
jimthesail is offline   Reply With Quote
Old 08-03-2020, 06:34   #4
Do or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 10,589
Re: Battery Terminal Corrosion

Quote:
Originally Posted by jimthesail View Post
Checked terminal and sealed OK so dismissed suggestion ! But, lo and behold, when I extracted battery to clean and charge found alternator pulley had gouged a neat hole in centre top corner. Suspect vapour forms an external battery in the atmosphere and produces the growth which is soft and furry ! Problem solved, I hope ?
Thanks
Jim
It means you got acid vapor over parts like the pulley, belt etc. Wash that with some baking soda and water, then rinse well. I often dry metal parts with heat gun and wd40 (which is biodegradable) then buff with clean microfiber cloth
s/v Jedi is offline   Reply With Quote
Old 09-03-2020, 00:24   #5
Registered User

Join Date: Jun 2015
Location: Maylandsea Blackwater
Boat: Project 31
Posts: 14
Re: Battery Terminal Corrosion

Ah Ha ! and yesterday when tipping battery to check my repair did in fact find drops around terminal post so it did leak !
Cheers
Jim
jimthesail is offline   Reply With Quote
Old 09-03-2020, 02:17   #6
Registered User

Join Date: Dec 2019
Posts: 88
Re: Battery Terminal Corrosion

To stop rust on terninals I put Vaseline on them, it doesn't affect anything.
Michael Cobbe is offline   Reply With Quote
Old 09-03-2020, 17:07   #7
Registered User

Join Date: Oct 2015
Posts: 2,008
Re: Battery Terminal Corrosion

Quote:
Originally Posted by jimthesail View Post
Suspect vapour forms an external battery in the atmosphere and produces the growth which is soft and furry !
And external, gas phase, battery? QUICK Run, do not walk, to the patent office with that one!
__________________

billknny is offline   Reply With Quote
Reply

Tags
battery, corrosion

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Stray- Current Corrosion, or Galvanic Corrosion, or?????...Help sailcrazy Electrical: Batteries, Generators & Solar 46 25-03-2019 21:35
Problem with Negative Terminal Corrosion DefinitelyMe Electrical: Batteries, Generators & Solar 21 20-11-2014 18:48
Battery Terminal Cover or Cover Entire Battery Top ? sdowney717 Electrical: Batteries, Generators & Solar 5 14-07-2011 04:14
Suggestions for Battery Terminal Tie Rods? Roy M Electrical: Batteries, Generators & Solar 20 19-07-2009 05:40
Norseman Swageless Terminal To Terminal Insulators GWB Classifieds Archive 0 21-09-2008 12:47

Advertise Here


All times are GMT -7. The time now is 21:28.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.